Domed screen radiant burner



sept. 1o, 196s Filed June 29, 1966 2 Sheets-Sheet l Sept. 10,1968 D. SPAONARA ETA.. 3,401,000

DOMED SCREEN RADIANT BURNER 2 Sheets-Sheet 2 Filed June 29. 1966 /m/wmer DOMENCK SRAONRA EDWARD M. REDSTREAKE United States Patent O 3,401,000 DOMED SCREEN RADIANT BURNER Domenick Spaonara, Allentown, and Edward M. Redstreake, Macungie, Pa., assignors to Caloric Corporation, Topton, Pa., a corporation of Pennsylvania Filed June 29, 1966, Ser. No. 561,595 4 Claims. (Cl. 431-329) ABSTRACT OF THE DISCLOSURE Gas burning infrared ray generator made of sheet metal and seamless. Also embodies means for insuring uniform combustion, and is not readily extinguished by ordinary gusts of wind.

This invention relates to a gas burning infrared ray generator and, more particularly, to an infrared ray generator which is especially adapted for broiling foods, and which, for convenience, is hereinafter referred to as a radiant burner.

The object of the invention is to produce an improved radiant burner of the type set forth.

A further object is to produce a radiant 'burner which dispenses with the use of a venturi tube and which is inexpensive to produce.

The full nature of the invention will be understood from the following specification and the accompanying drawings in which:

FIG. 1 is a top plan view of a radiant burner embodying the invention.

FIG. 2 is a side elevational view of the same.

FIG. 3 is a bottom plan view of the same.

FIG. 4 is an end view looking in the direction of line 4-4 on FIG. 2.

FIG. 5 is an end view looking in the direction of line 5-5 on FIG. 2.

FIG. 6 is a sectional view looking in the direction of line 6-6 on FIG. 1.

FIG. 7 is a fragmentary view looking in the direction of line 7-7 on FIG. 6.

FIG. 8 is a sectional view looking in the direction of line 8--8 on FIG. 6.

FIG. 9 is a fragmentary view looking in the direction of line 9-9 on FIG. 6.

IFIG. 10 is a perspective view of the baille shown in FIGS. 8 and 9.

The burner illustrated includes a central plate 10 having an opening 12, a. gaseous fuel receiving member 14 on one side thereof, and combustion sustaining member 16 on the other side thereof. As shown, the gas receiving member is above and the combustion sustaining member is below plate 10.

The upper gas receiving member 14 is preferably formed of a. at sheet which is drawn to provide an elongated dome 18 which merges with dat side marginal portions 20 and with end flat marginal portion 22.

The lower, combustion sustaining member 16 is preferably formed of one or more screens of the same or of diiferent gauges, which, when drawn, form an elongated dome 26, which merges with flat side marginal portions 30 and opposite end flat marginal portions 32 and 34. As can be seen from FIGS. 6 and 7, when the gas receiving member and the combustion sustaining member are assembled on the opposite sides of plate 10, the fuel admitted through the open end 35 of the gas receiving member will flow, through opening 12, into the combustion sustaining member 16.

To diffuse the gas uniformly through the screens, We provide a baille 36 which is best shown in FIG. 10. This bale includes a bottom wall 38, side walls 40, and an end wall 42. The side walls and end walls of the baflle Cil ice

are bent to form flanges 44 for attachment to the underside of plate 10. Bottom wall 38 and side wallsv 40 are provided with calibrated slots 46 and end wall 42 is provided With a calibrated opening 48. The end of the baffle facing the intake end of the burner is fully open. Some of the metal which is severed to form opening 12 is bent up to form a forwardly inclined baflle S0.

To hold the parts together, side marginal portions 20 and end marginal portion 22 are extended downwardly as at 54 and 56, respectively, and inwardly as at 58 and 60, respectively, so as to wrap around and enclose the corresponding side and end edges of plate 10 and to enclose and underlie the side marginal portions 30 and end marginal portion 32 of the screens. This is clearly shown in FIGS. 3, 6 and 7. Optionally, the marginal porilons 20 and 22 of member 14, are spot-welded as at This manner of securing the parts greatly reduces the cost of manufacture because it makes the use of seamwelding, or other means, for producing a gas tight peripheral seal unnecessary. This is due to the fact that any gas which leaks between the marginal portions of gas receiving member 14 and of plate 10 will be directed to the adjacent portions of the screens where the leaked gas will burn the same as the gas deliberately admitted through opening 12. This makes it possible to resort to spot-.welding instead of more expensive seam-welding or brazmg, or other manner of producing a gas tight connection. To close the bottom portion of member 14 which extends beyond the inlet edge of plate 10 and screen marginal portion 34, we provide an extension 62 which abuts plate 10, FIG. 6I and which has an offset 11p 64 which underlies the marginal portion 34 of the screen. Extension 62 is also spot-Welded at 63.

By making dome 18 substantially co-extensive with plate 10, We provide a degree of reinforcement which makes it possible to use light-gauge sheet metal instead of castings, thus reducing the cost and reducing the weight of the unit.

As is Well known, venturi tubes are conventionally u sed to insure the inspiration or entrainment of combust1on air. vBut we have found that the construction above set forth, wherein the inlet opening is semi-cylindrical and 1s disposed beyond the inlet end of the combustion screen operates very satisfactorily. This also reduces the cost of manufacture.

As of now, we have no theoretical explanation of this phenomenon but actual testing shows that it works.

What We claim is:

1. A gas burner including:

an elongated plate, having an opening therein spaced lnwardly from the sides and ends thereof,

a gas receiving member on one side of said plate comprlsmg an elongated, substantially semi-cylindrical conduit adapted to overlie said opening-and having a flat end portion and flat side marginal portions adapted to abut the corresponding side and end flat marginal portions of the plate,

a combustion sustaining member on the other side of said plate comprising an elongated screen of a substantially semi-cylindrical cross section adapted to underlie said opening and having a flat end portion and flat side marginal portions adapted to abut said side and end ilat marginal portions of said plate,

one end of said conduit being open and extending beyond the corresponding end of said screen and said plate and the other end of said conduit being closed and substantially co-terminous with the corresponding end of the screen,

said at end and side marginal portions of said gas receiving member being extended and bent to enclose the corresponding side and end edges of said plate and the side and end Ilat marginal portions of the combustion sustaining member to clamp the gas receiving member and the combustion sustaining member to opposite sides of said plate.

2. The apparatus recited in claim 1 and a balie secured to said one side of said plate and extending into said gas receiving member to deflect the incoming gas into said opening in said plate.

3. The apparatus recited in claim 1 and an enclosing member adapted to close the end of said conduit extending beyond said plate and having a lip portion which underlies the end marginal portions of said screen and said plate.

4. The apparatus dened in claim 1 and a baie on the opposite side of said plate, said last mentioned bafile comprising:

opposite side walls each having an opening therein,

an end wall having an opening therein,

a bottom Wall having an opening therein,

4 and means securing said baiile to said other side of said plate.

References Cited UNITED STATES PATENTS 361,161 4/1887 Jackson Z39-590.3 386,984 6/1888 Jackson 239-5903 1,486,665 3/1924 Holloway et al. 239553-3 1,643,607 9/1927 Kielberg Z39-553.3 2,829,874 4/1958 Freeman Z39-590.3 3,029,866 4/1962 Honger 158-114 3,129,749 4/1964 Honger 158-114 3,188,366 6/1965 Flynn 158-99 X FOREIGN PATENTS 147,448 7/ 1952 Australia.

FREDERICK L. MATTESON, JR., Primary Examiner.

20 H. B. RAMEY, Assistant Examiner.

U.S. DEPARTMENT 0F COMMERCE PATENT OFFICE Washington,D.C. 20231 UNITED STATES PATENT GFFICE CERTIFICATE OF CORRECTION Patent No. 3,401,000 September lO, 1968 Domenick Saponara et al.

It is certified that error appears in the above identified patent and that said Letters Patent are hereby corrected as shown below:

In'the sheets of drawings, line l, "D. SPAONARA" should read D. SAPONARA lower right-hand corner "DOMENICK SRAONARA" should read DOMENICK SAPONARA In the heading to the printed specification, line 3, Domenick Spaonara" should read Domenick Saponara Signed and sealed this 17th day of March 1970.

(SEAL) Attest:

WILLIAM E. SCHUYLER, JR.

Edward M. Fletcher, Jr.

Commissioner of Patents Attesting Officer 

